{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:F3VCWKJ2BIZJPGPHIPUWY5MFWE","short_pith_number":"pith:F3VCWKJ2","canonical_record":{"source":{"id":"2506.05071","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DB","submitted_at":"2025-06-05T14:19:05Z","cross_cats_sorted":["cs.AR","cs.DS"],"title_canon_sha256":"1cba7a77c98716dbc64c2065d609a8084c156aed4ec294c196e76e5120aa1666","abstract_canon_sha256":"e560764f02cb6e49ef16686c1c70a85e55cef635bf70b359a9389f515d0b1a07"},"schema_version":"1.0"},"canonical_sha256":"2eea2b293a0a329799e743e96c7585b13cc4a6edd7caa01dca5f4badb323bd44","source":{"kind":"arxiv","id":"2506.05071","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.05071","created_at":"2026-07-05T11:16:41Z"},{"alias_kind":"arxiv_version","alias_value":"2506.05071v1","created_at":"2026-07-05T11:16:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.05071","created_at":"2026-07-05T11:16:41Z"},{"alias_kind":"pith_short_12","alias_value":"F3VCWKJ2BIZJ","created_at":"2026-07-05T11:16:41Z"},{"alias_kind":"pith_short_16","alias_value":"F3VCWKJ2BIZJPGPH","created_at":"2026-07-05T11:16:41Z"},{"alias_kind":"pith_short_8","alias_value":"F3VCWKJ2","created_at":"2026-07-05T11:16:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:F3VCWKJ2BIZJPGPHIPUWY5MFWE","target":"record","payload":{"canonical_record":{"source":{"id":"2506.05071","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DB","submitted_at":"2025-06-05T14:19:05Z","cross_cats_sorted":["cs.AR","cs.DS"],"title_canon_sha256":"1cba7a77c98716dbc64c2065d609a8084c156aed4ec294c196e76e5120aa1666","abstract_canon_sha256":"e560764f02cb6e49ef16686c1c70a85e55cef635bf70b359a9389f515d0b1a07"},"schema_version":"1.0"},"canonical_sha256":"2eea2b293a0a329799e743e96c7585b13cc4a6edd7caa01dca5f4badb323bd44","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:16:41.763346Z","signature_b64":"QYjt7y8o1Doa+gjff7aRwN6O5kXqbbqKGf/MLrC7S3wdpakxeD/YyT3xbkexHUSgzD4/nMsK85OBQ92GYyfyDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2eea2b293a0a329799e743e96c7585b13cc4a6edd7caa01dca5f4badb323bd44","last_reissued_at":"2026-07-05T11:16:41.762885Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:16:41.762885Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2506.05071","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:16:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hKPScI0rUveNREtNFxud2aeCGInyFm2N+5itDLMiIFvC1SIcVyZbG7BNA4WYUNFCnLU/4POQmpjOKl7OF5GCBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T01:12:28.922975Z"},"content_sha256":"ab0f7b3cdf1da5a8247e48a3121333e14b3a8f71329cb348307208d65f693f92","schema_version":"1.0","event_id":"sha256:ab0f7b3cdf1da5a8247e48a3121333e14b3a8f71329cb348307208d65f693f92"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:F3VCWKJ2BIZJPGPHIPUWY5MFWE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Memory Hierarchy Design for Caching Middleware in the Age of NVM","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.AR","cs.DS"],"primary_cat":"cs.DB","authors_text":"Jenny Lam, Sandy Irani, Shahram Ghandeharizadeh","submitted_at":"2025-06-05T14:19:05Z","abstract_excerpt":"Advances in storage technology have introduced Non-Volatile Memory, NVM, as a new storage medium. NVM, along with Dynamic Random Access Memory (DRAM), Solid State Disk (SSD), and Disk present a system designer with a wide array of options in designing caching middleware. Moreover, design decisions to replicate a data item in more than one level of a caching memory hierarchy may enhance the overall system performance with a faster recovery time in the event of a memory failure. Given a fixed budget, the key configuration questions are: Which storage media should constitute the memory hierarchy?"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.05071","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2506.05071/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:16:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VmdJGRhOspTR0+wikwaxv0Xv/zDLXiSbAK6DpMlavMGKjLlA7mD6CmsWoxcxjTHQznJvasM9A0OZhOxXwjx5Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T01:12:28.923932Z"},"content_sha256":"16cc4ce1a02214b14bc4dc6386fe51346986efbcc8c654e3e3885820fb6ef2be","schema_version":"1.0","event_id":"sha256:16cc4ce1a02214b14bc4dc6386fe51346986efbcc8c654e3e3885820fb6ef2be"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/F3VCWKJ2BIZJPGPHIPUWY5MFWE/bundle.json","state_url":"https://pith.science/pith/F3VCWKJ2BIZJPGPHIPUWY5MFWE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/F3VCWKJ2BIZJPGPHIPUWY5MFWE/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-08T01:12:28Z","links":{"resolver":"https://pith.science/pith/F3VCWKJ2BIZJPGPHIPUWY5MFWE","bundle":"https://pith.science/pith/F3VCWKJ2BIZJPGPHIPUWY5MFWE/bundle.json","state":"https://pith.science/pith/F3VCWKJ2BIZJPGPHIPUWY5MFWE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/F3VCWKJ2BIZJPGPHIPUWY5MFWE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:F3VCWKJ2BIZJPGPHIPUWY5MFWE","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"e560764f02cb6e49ef16686c1c70a85e55cef635bf70b359a9389f515d0b1a07","cross_cats_sorted":["cs.AR","cs.DS"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DB","submitted_at":"2025-06-05T14:19:05Z","title_canon_sha256":"1cba7a77c98716dbc64c2065d609a8084c156aed4ec294c196e76e5120aa1666"},"schema_version":"1.0","source":{"id":"2506.05071","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.05071","created_at":"2026-07-05T11:16:41Z"},{"alias_kind":"arxiv_version","alias_value":"2506.05071v1","created_at":"2026-07-05T11:16:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.05071","created_at":"2026-07-05T11:16:41Z"},{"alias_kind":"pith_short_12","alias_value":"F3VCWKJ2BIZJ","created_at":"2026-07-05T11:16:41Z"},{"alias_kind":"pith_short_16","alias_value":"F3VCWKJ2BIZJPGPH","created_at":"2026-07-05T11:16:41Z"},{"alias_kind":"pith_short_8","alias_value":"F3VCWKJ2","created_at":"2026-07-05T11:16:41Z"}],"graph_snapshots":[{"event_id":"sha256:16cc4ce1a02214b14bc4dc6386fe51346986efbcc8c654e3e3885820fb6ef2be","target":"graph","created_at":"2026-07-05T11:16:41Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2506.05071/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Advances in storage technology have introduced Non-Volatile Memory, NVM, as a new storage medium. NVM, along with Dynamic Random Access Memory (DRAM), Solid State Disk (SSD), and Disk present a system designer with a wide array of options in designing caching middleware. Moreover, design decisions to replicate a data item in more than one level of a caching memory hierarchy may enhance the overall system performance with a faster recovery time in the event of a memory failure. Given a fixed budget, the key configuration questions are: Which storage media should constitute the memory hierarchy?","authors_text":"Jenny Lam, Sandy Irani, Shahram Ghandeharizadeh","cross_cats":["cs.AR","cs.DS"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DB","submitted_at":"2025-06-05T14:19:05Z","title":"Memory Hierarchy Design for Caching Middleware in the Age of NVM"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.05071","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:ab0f7b3cdf1da5a8247e48a3121333e14b3a8f71329cb348307208d65f693f92","target":"record","created_at":"2026-07-05T11:16:41Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"e560764f02cb6e49ef16686c1c70a85e55cef635bf70b359a9389f515d0b1a07","cross_cats_sorted":["cs.AR","cs.DS"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DB","submitted_at":"2025-06-05T14:19:05Z","title_canon_sha256":"1cba7a77c98716dbc64c2065d609a8084c156aed4ec294c196e76e5120aa1666"},"schema_version":"1.0","source":{"id":"2506.05071","kind":"arxiv","version":1}},"canonical_sha256":"2eea2b293a0a329799e743e96c7585b13cc4a6edd7caa01dca5f4badb323bd44","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2eea2b293a0a329799e743e96c7585b13cc4a6edd7caa01dca5f4badb323bd44","first_computed_at":"2026-07-05T11:16:41.762885Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:16:41.762885Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QYjt7y8o1Doa+gjff7aRwN6O5kXqbbqKGf/MLrC7S3wdpakxeD/YyT3xbkexHUSgzD4/nMsK85OBQ92GYyfyDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:16:41.763346Z","signed_message":"canonical_sha256_bytes"},"source_id":"2506.05071","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ab0f7b3cdf1da5a8247e48a3121333e14b3a8f71329cb348307208d65f693f92","sha256:16cc4ce1a02214b14bc4dc6386fe51346986efbcc8c654e3e3885820fb6ef2be"],"state_sha256":"3189e53406aef1e62bd37b5150e1164b3e2e576ee3e4047b4fcc10cd7b277a2d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZOkGtutX30oVcfFI7p5sQNTtMqHbNpVl5A2g1r8LKirvBsonb6QFkcDtQ3VOe36ff6uMGSLmTHjrvHuHRIfkCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T01:12:28.931044Z","bundle_sha256":"a213e8651c1685dc559ba1968cd87f65d7ddc3d48408dd9d6a8609e2fe0119bb"}}